Application of Hilbert-Huang signal processing to ultrasonic non-destructive testing of oil pipelines     

毛义梅  阕沛文 《浙江大学学报(A卷英文版)》2006,7(2):130-134

INTRODUCTION Ensuring the integrity and safe operation of oil pipelines network is critical for ensuring the trans- portation of one of the most important forms of en- ergy. An inspection vehicle, called intelligent pig, which employs ultrasonic non-destructive testing technique is often used to inspect oil transmission pipelines (Okamoto et al., 1999; Reher et al., 2002). The ultrasonic detection principle involves the fun- damental concept that a propagating wave will be reflected and/o…  相似文献   

基于肤色模型和面部特征的人脸检测算法     

李琳  毛义梅 《教育技术导刊》2012,11(11):129-130

提出一种基于肤色模型和面部特征的人脸检测算法,在YCbCr颜色空间建立肤色模型,根据此模型进行肤色分割,为使分割更平滑,进行了形态学处理,再结合面部特征有效除去非人脸肤色区域。验证了该算法的可行性和高效性。  相似文献